planch1
/plɑːn(t)ʃ/ /plan(t)ʃ/(also plunch)
noun
1A plank or board of wood; (hence) a floor. Now English regional ( south-western ).
- Recorded earliest in planchnail..
2A slab, a flat plate; (Enamelling ) a clay tile used to support the piece of work during the process of baking. Now rare.
Origin
Middle English. From Anglo-Norman plaunche, planche and Middle French planche plank, slab.
planch2
/plɑːn(t)ʃ/ /plan(t)ʃ/verb
[with object] To floor using planks; to cover with planks or boards. Now British regional and Canadian.
Origin
Early 16th century. Either from planch, or from Middle French plancher to floor using planks.